Question
Sun April 08, 2012 By: Bhavna

# Whenever the shape and or size of a body changes, the cause may be a pair of forces .Give two examples identifying the pair of forces in each case .how do their magnitudes and directions compare

Mon April 09, 2012
The shape of a body may change on application of a force.
There are numerous examples for this statement.
Ex1- Consider a polythin bag. If you hold it from two hands and try to strech it, it changes its shape and the force in this case would be the force applied from your both hands at the end.
Ex2- A metal plate when pressed by hammer. In this case deformations may come in the metal as a result of the force applied by the hammer
Ex3- Hold a paper from one end in your hand and move the other end of the paper from other hand keeping one end fixed, in this case the paper goes from straight to a circular shape as a result of the force applied bu your other hand

Thank you
Regards,
Topper Team
Related Questions
Mon July 17, 2017

# This is the answer of question 15 in selina physics class 10 solutions which you have given. What is the reason of force being applied in this direction only? To lift up the wheel on the platform, Point X will become the point of rotation of the wheel. Why can't the force be applied at the diameter of the wheel so that the perpendicular distance of the line of action of force from the axis of rotation is maximum? This is one of the factors affecting torque. Torque is directly proportional to the perpendicular distance of the line of action of force from the axis of rotation. Therefore, by applying the force at the diameter, the perpendicular distance increases and due to this, the moment of force also increases. therefore, by applying minimum effort, the wheel can be raised.

Tue July 11, 2017

Home Work Help